Add the 'unread_count' event. Listen to changes on Chat.unreadCount (#2059)

* Initial commit

* Update index.d.ts

* The functions was returning a 'brief' chat data. With this, it will return full Chat model..

* Eslint suggested fixex

---------

Co-authored-by: tuyuribr <45042245+tuyuribr@users.noreply.github.com>
Co-authored-by: Rajeh Taher <rajeh@reforward.dev>

src/Client.js

@@ -407,6 +407,15 @@ class Client extends EventEmitter {
 
         });
 
+        await page.exposeFunction('onChatUnreadCountEvent', async (data) =>{
+            const chat = await this.getChatById(data.id);
+            
+            /**
+             * Emitted when the chat unread count changes
+             */
+            this.emit(Events.UNREAD_COUNT, chat);
+        });
+
         await page.exposeFunction('onMessageMediaUploadedEvent', (msg) => {
 
             const message = new Message(this, msg);
@@ -526,7 +535,8 @@ class Client extends EventEmitter {
                     }
                 }
             });
-            
+            window.Store.Chat.on('change:unreadCount', (chat) => {window.onChatUnreadCountEvent(chat);});
+
             {
                 const module = window.Store.createOrUpdateReactionsModule;
                 const ogMethod = module.createOrUpdateReactions;

src/util/Constants.js

@@ -41,6 +41,7 @@ exports.Events = {
     MESSAGE_REVOKED_EVERYONE: 'message_revoke_everyone',
     MESSAGE_REVOKED_ME: 'message_revoke_me',
     MESSAGE_ACK: 'message_ack',
+    UNREAD_COUNT: 'unread_count',
     MESSAGE_REACTION: 'message_reaction',
     MEDIA_UPLOADED: 'media_uploaded',
     GROUP_JOIN: 'group_join',